3(x+21)+4(x+35)=-7

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Solution for 3(x+21)+4(x+35)=-7 equation: 



3(x+21)+4(x+35)=-7

We move all terms to the left:

3(x+21)+4(x+35)-(-7)=0

We add all the numbers together, and all the variables

3(x+21)+4(x+35)+7=0

We multiply parentheses

3x+4x+63+140+7=0

We add all the numbers together, and all the variables

7x+210=0

We move all terms containing x to the left, all other terms to the right

7x=-210

x=-210/7

x=-30

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